The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 2017
Filed:
Feb. 25, 2015
Applicant:
Onesubsea Ip Uk Limited, London, GB;
Inventors:
Assignee:
OneSubsea IP UK Limited, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 27/10 (2006.01); H01F 30/12 (2006.01); H01F 27/08 (2006.01); H01F 27/29 (2006.01); E02B 3/00 (2006.01); H01F 27/02 (2006.01); H01F 27/28 (2006.01); H01F 27/12 (2006.01); H01F 27/34 (2006.01);
U.S. Cl.
CPC ...
H01F 27/29 (2013.01); E02B 3/00 (2013.01); H01F 27/02 (2013.01); H01F 27/12 (2013.01); H01F 27/2823 (2013.01); H01F 27/343 (2013.01);
Abstract
A seawater-based high resistance grounding device for a subsea transformer includes an insulated pipe mounted to the outside of the transformer so as to be exposed to seawater. The insulated pipe has two or more cylindrical metallic electrodes electrically connected to ground and to the neutral node of the secondary transformer windings. The volume of seawater within the pipe and between the electrodes provides one or more high resistance ground paths for protection of the transformer.